190805944 has 32 divisors (see below), whose sum is σ = 411033600. Its totient is φ = 81341280.

The previous prime is 190805911. The next prime is 190805959. The reversal of 190805944 is 449508091.

It is a super-2 number, since 2×190805944² = 72813816531462272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 190805897 and 190805906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1777 + ... + 19615.

It is an arithmetic number, because the mean of its divisors is an integer number (12844800).

Almost surely, 2^190805944 is an apocalyptic number.

190805944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

190805944 is an abundant number, since it is smaller than the sum of its proper divisors (220227656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

190805944 is a wasteful number, since it uses less digits than its factorization.

190805944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18043 (or 18039 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 190805944 is about 13813.2524772408. The cubic root of 190805944 is about 575.7014190039.

The spelling of 190805944 in words is "one hundred ninety million, eight hundred five thousand, nine hundred forty-four".